Malicious PDF — malware analysis report

Static analysis result for SHA-256 24666daa61605a53…

MALICIOUS

PDF

88.7 KB Created: 2021-09-05 05:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6c690278fff6013742f0b12f82b530bd SHA-1: 1e63dc3690edcbcf4cfb51912f4e551e2f7081f3 SHA-256: 24666daa61605a53104b375d66d08588656ab3fff76ebc325d7ad3111eefc005
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://babetravelling.com/ckfinder/userfiles2/files/naloxuzosobijefakiba.pdf In PDF document text
    • https://metnar.pl/web/uploads/files/basurinapubokanewozegot.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/65200187651.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/f13f3b694efb7224328be05fcecc7552/newiwogabopewafasojovorub.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/45828826781.pdfIn PDF document text
    • http://vejwun.cz/images/74291507225.pdfIn PDF document text
    • http://metallpress.info/files/midifexitilobavuxefemiwan.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/tabomewufe.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/7262502484.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/0b7e3f282baf62431af4cbddf1e133e9/xenubepufe.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d99949c619e---49442418754.pdfIn PDF document text
    • https://kaimano.it/file/tesomulajetumojif.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/27888892769.pdfIn PDF document text
    • http://jaika.in/images/documents/files/59135554695.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16100a7d36064b---53564768470.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607e43d30bb57---59903127376.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/pajabovun.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/26068064512.pdfIn PDF document text
    • http://turnyras.lt/Files/file/zipipusijekolemofere.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/bfhi8f6rav0h7k95lcvtcg1hdn/79606763628.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/8658214127.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc61631d95---10002841757.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/riwodekuvud.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/48974619736.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=tenemos+que+hablar+de+kevin+analisis+psicologico+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 11476 bytes
SHA-256: 671e7b6f6c547517807d00bd3f4bdcc220a39fbbbded98c540744cb688604afd
font_01_sfnt_off00010cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EB 18964 bytes
SHA-256: e3c4c42a0ee892c18465945bcead0905f260fa3fa7bc6788e740ee789b743950

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